Top-Rated Extensions

Subscribe

CALDAV - Search/Subscribe Requires Restart

Add CalDAV search & subscribe feature to Lightning

Rated 3 out of 5 stars (12)
2,683 users

TB Change From and Fcc on Compose Extension Requires Restart

You can now temporarily change the from and fcc on...

Rated 3 out of 5 stars (12)
1 user

Personasizer

Personasizer allows you to expose more of your persona's header image. Useful for personas that have text or an important part of their content cut off by the browser's navigation elements.

Rated 3 out of 5 stars (6)
18 users

fairBlock

Un bloqueur de publicité équitable. Préservez le web gratuit en choisissant sur quels sites vous bloquez la publicité.

Rated 3 out of 5 stars (3)
212 users

Insert Link from Local File Requires Restart

Inserts links from local files via drag and drop on the composition window.

Rated 3 out of 5 stars (3)
458 users

Reject Button 1.0 Requires Restart

Annoyed by receiving mails with missing or wrong subjects or meaningless message bodies? Simply reject them with the Reject Button Add-On and enforce proper e-mail etiquette at the cost of just a few friendships.

Rated 3 out of 5 stars (3)
28 users

JS Deminifier

Simple JavaScript deminifier

Rated 3 out of 5 stars (3)
53 users

Event-to-task conversion activator Requires Restart

Activates the Event-Task conversion ability...

Rated 3 out of 5 stars (3)
1 user

MozLab Requires Restart

Remote shell and test-driven development tool for Mozilla developers

Rated 3 out of 5 stars (3)
1 user

xSearchbarT2 Requires Restart

Somewhere between Thunderbird 1.5 and Thunderbird 2 the message search bar disappeared. This extension restores the search bar. Thunderbird 2 and newer only.

Rated 3 out of 5 stars (8)
53 users

AboutConfig Requires Restart

about:config for...

Rated 3 out of 5 stars (13)
17 users

Message Notes Requires Restart

Add Notes to messages. Notes are stored in a plaintext file, typically in your profile. The plaintext notes file can be stored elsewhere to enable sharing of notes across a...

Rated 3 out of 5 stars (10)
2 users

Mark GMail Read

Automatically marks all messages in the [Gmail] folder and all subfolders as read.

Rated 3 out of 5 stars (5)
196 users

Grammar Checker Requires Restart

Checks grammar using LanguageTool.

Rated 3 out of 5 stars (5)
2,851 users

FolderCheck Requires Restart

Allows you to easily tell Thunderbird to check multiple folders for messages

Rated 3 out of 5 stars (5)
6 users

Fix Tb Titlebar Extension Requires Restart

You can now modify the Titlebar of TB's main...

Rated 3 out of 5 stars (5)
3 users

Tag the Bird Requires Restart

Tag the Bird gives the power of tagging to Thunderbird.

Rated 3 out of 5 stars (14)
0 users

GNOME keyring password integration Requires Restart

Extension that allows Firefox and Thunderbird to store passwords in Keyring, Gnome's default password store.

Rated 3 out of 5 stars (16)
170 users

Highlight External Addresses Requires Restart

This extension helps to warn the user when composing a message to a mixed group of people both in and out of the sender's organization. External addresses are highlighted in orange as a reminder.

Rated 4 out of 5 stars (2)
263 users

SecondOpinion Requires Restart

This extension implements a convenient way to check and upload attachments against VirusTotal.com

Rated 4 out of 5 stars (2)
288 users